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Page
-Exhaust venting-
The vent system must be sealed airtight. All seams and joints
without gaskets
must be sealed with high
heat resistant silicone sealant or UL listed aluminum adhesive tape having a minimum temperature rating
of 350 °F (177 °C). For best results, a vent system should be as short and straight as possible.
•
This water heater is a Category III appliance and must be vented accordingly with any 4 in. (102
mm) vent approved for use with Category III or Special BH type gas vent.
•
Follow the vent pipe manufacturer’s instructions when installing the vent pipe.
•
Do not common vent this appliance with any other vented appliance.
(Do not terminate vent
into a chimney. If the vent must go through the chimney, the vent must run all the way through
the chimney with Category III approved or Special BH vent pipe.)
•
When the horizontal vent run exceeds 5 ft (1.5 m), support the vent run at 3 ft (0.9 m) intervals
with overhead hangers.
•
When the vent run exceeds 5 ft (1.5 m), a condensate drain is recommended. It should be
installed as close to the heater as possible.
•
The maximum length of exhaust vent piping must not exceed 50 ft (15.2 m) (deducting 5 ft (1.5
m) for each elbow used in the venting system). Do not use more than 5 elbows.
Diameter
Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
4 in. (102 mm)
5
50 ft (15.2 m )
Each elbow added, deduct 5 ft. (1.5m) from max. vent length.
No. of Elbows
Max. Vertical or Horizontal Vent Length
0
50 ft (15.2 m)
1
45 ft (13.7 m)
2
40 ft (12.2 m)
3
35 ft (10.7 m)
4
30 ft (9.1 m)
5
25 ft (7.6 m)
Excludes elbow termination, rain caps, or the 4 in. (102 mm) Concentric termination
Installation
Installation Manual
